摘要: Description 给出整数$n,k$,计算$G(n,k)=\sum\limits_{i=1}^n=k \ mod \ i$,$1 K) { break; } r = min(N, K/(K/l)); ans = (r l + 1) (K/l) (l + r)/2; } c++ //https: 阅读全文
posted @ 2020-05-16 00:14 EZ4ZZW 阅读(84) 评论(0) 推荐(0) 编辑